My friend told me this is a fantastic story. I watch it and does not find it an amazing one, but surely a rating of 4.8 is incredibly low.
The story is far from captivating, just follow the formular of a teacher-inspiring-student movie. But with the presence of Andy Lau, you will have a guaratine of certain quality. The setting, the school campus, the costume, and as small as the music score file are all well chosen. The role of parents, headmaster, director of school, enemy conductor are all acted by famous star. For foreigners, in fact the enemy conductor is actually a true music director.
I cannot say that it is very impressing, but surely it got a passing rate.